GB/T 34589-2017Road vehicles—Diagnostic connector (English PDF)

3.1 Diagnostic connector

The short-term connected, pluggable connector used for the communication between vehicles and external plug-in diagnostic equipment. It consists of two parts. vehicle connector socket and external plug-in equipment connector plug.

4.1 Structure, shape, and dimension

The shape and dimension of connector are shown in Figure 1 and Figure 2.

The shape and dimension of plug terminal are shown in Figure 3. When the two terminals are connected, the terminals of signal "ground" and power supply "ground" of plug shall, prior to other plug terminals, establish electrical connection. When disconnecting, only after other terminals are disconnected, For vehicles which do not use CAN for communication, the use of terminal 6 is specified by the vehicle manufacturer. But it shall not interfere with the normal operation of external plug-in equipment or cause damage.

For vehicles which use ISO related standards for communication, socket terminal 7 is assigned to K line for signal connection.

For vehicles which do not use ISO related standards for communication, the use of terminal 7 is specified by the vehicle manufacturer. But it shall not interfere with the normal operation of external plug-in equipment or cause damage.

For vehicles which use CAN for communication, socket terminal 14 is assigned to CAN-L for signal connection.

For vehicles which do not use CAN for communication, the use of terminal 14 is specified by the vehicle manufacturer. But it shall not interfere with the normal operation of external plug-in equipment or cause damage.

For vehicles which use ISO related standards for communication, socket terminal 15 is assigned to L line for signal connection.

For vehicles which do not use ISO related standards for communication, the use of terminal 15 is specified by the vehicle manufacturer. But it shall not interfere with the normal operation of external plug-in equipment or cause damage.

Socket terminal 16 provides voltage for external plug-in equipment to communicate, and can also be used as reference voltage.

It shall use fuse or other circuit protection elements to protect this connection.

This circuit can be integrated with other circuits. Socket terminal 16 shall be able to support supply currents of no less than 4.0 A/12 V and 2.0 A/24 V.

4.2.2.5 Socket terminal 7

4.2.2.6 Socket terminal 14

4.2.2.7 Socket terminal 15

4.2.2.8 Socket terminal 16

4.2.3 Definition of plug terminal

4.2.3.1 Plug terminal 1, 2, 3, 8, 9, 10, 11, 12, and 13 Plug terminal 1, 2, 3, 8, 9, 10, 11, 12, and 13 are reserved for use by resistance); USE 1 A constant current source to test. The resistance of the 100 mm wire between connection point and measuring point shall be subtracted from the measured value.

5.3.2.2 Requirement

The connecting resistance shall not exceed 10 m ohm.

5.4 Assembly performance tests and requirements of connector

5.4.1 Insulation resistance between adjacent terminals

5.4.1.1 Test

At a relative humidity of 45%~75%, CONNECT the two parts of the connector;

APPLY 500 V direct current voltage between adjacent terminals; TEST the insulation resistance between adjacent terminals. During the test, the terminal connected to the negative terminal of the direct current voltage shall be grounded.

5.4.1.2 Requirement

The insulation resistance between adjacent terminals shall not be less than 20 M ohm.

5.4.2 Retention force of terminal in sheath

5.4.2.1 Test

At a uniform speed of 50 mm/min, in the direction of center line of terminal, INCREASE the force, until the terminal is pulled out. The maximum force which the terminal can withstand is the retention force of the terminal in the sheath.

5.4.2.2 Requirement

The retention force of the terminal in the sheath shall not be less than 80 N.

5.4.3 Plugging-unplugging force of connector

5.4.3.1 Test

ADJUST the speed of force tester to 50 mm/min, in the direction of center line of connector, to PLUG and UNPLUG; RECORD the maximum force required for the connector to be plugged in place and completely separated.

5.4.3.2 Requirement

When 16 terminals are used, the plugging force and unplugging force shall […]